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Finding the Fourth Proportional to 15,309, 21,135.06 and 11,576.52

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Solution

The fourth proportional to 15,309, 21,135.06 and 11,576.52 is: 15,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309 : 21,135.06 = 11,576.52 : x
  2. Step 2: Convert to fraction form
    15,309/21,135.06 = 11,576.52/x
  3. Step 3: Cross multiply
    15,309x = 21,135.06 × 11,576.52
  4. Step 4: Simplify right side
    15,309x = 244,670,444.79
  5. Step 5: Solve for x
    x = 244,670,444.79/15,309
  6. Step 6: Final answer
    x = 15,982.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.